Patent SG-11201906370T-A (SG)
Title: Backward-compatible integration of harmonic transposer for high frequency reconstruction of audio signals
Inventor: VILLEMOES LARS
IPC: G10L19/22
Filed: 2018-03-19
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 27 September 2018 (27.09.2018) WIP0 I PCT 011101 VIII n ono o VIII VIII Imo °El (10) International Publication Number WO 2018/175347 Al (51) International Patent Classification: G06F 17/10 (2006.01) G1OL 19/24 (2013.01) G10L 19/02 (2013.01) G10L 19/26 (2013.01) G10L 19/22 (2013.01) (21) International Application Number: PCT/US2018/023183 (22) International Filing Date: 19 March 2018 (19.03.2018) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 62/475,619 23 March 2017 (23.03.2017) US (71) Applicants: DOLBY INTERNATIONAL AB [SE/NL]; Apollo Building, 3E Herikerbergweg 1-35, 1101 CN Amsterdam Zuidoost (NL). DOLBY LABORATORIES LICENSING CORPORATION [US/US]; 1275 Market Street, San Francisco, California 94103 (US). (72) Inventors: VILLEMOES, Lars; c/o Dolby Laboratories, Inc., 1275 Market Street, San Francisco, California 94103 (US). PURNHAGEN, Heiko; c/o Dolby Laboratories, Inc., 1275 Market Street, San Francisco, California 94103 (US). EKSTRAND, Per; c/o Dolby Laboratories, Inc., 1275 Mar- ket Street, San Francisco, California 94103 (US). (74) Agent: DOLBY LABORATORIES, INC. et al.; Intellec- tual Property Group, 1275 Market Street, San Francisco, California 94103 (US). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). (54) Title: BACKWARD-COMPATIBLE INTEGRATION OF HARMONIC TRANSPOSER FOR HIGH FREQUENCY RE- CONSTRUCTION OF AUDIO SIGNALS L -400 Audio Input (Decoder) Buffer F.—. ‘ \"--201 ( -401 eSBR Control Bit Generation 215 r 202 Decode r 203 1 eSBR Processing , De- ormatter 1-1 71- kl) 1-1 N N 1-1 00 O N C FIG. 5 output (57) : A method for decoding an encoded audio bitstream is disclosed. The method includes receiving the encoded audio bit- stream and decoding the audio data to generate a decoded lowband audio signal. The method further includes extracting high frequen- cy reconstruction metadata and filtering the decoded lowband audio signal with an analysis filterbank to generate a filtered lowband audio signal. The method also includes extracting a flag indicating whether either spectral translation or harmonic transposition is to be performed on the audio data and regenerating a highband portion of the audio signal using the filtered lowband audio signal and the high frequency reconstruction metadata in accordance with the flag. [Continued on next page] WO 2018/175347 Al MIDEDIMOMMIDIREEMOMOINEIIIMMOHNEVOIMIE Declarations under Rule 4.17: as to applicant's entitlement to apply for and be granted a patent (Rule 4.17(H)) as to the applicant's entitlement to claim the priority of the earlier application (Rule 4.17(iii)) Published: — with international search report (Art. 21(3))